*
     * @param <K> the key type of {@link IdentityHashMap}
     * @param <V> the value type of {@link IdentityHashMap}
     * @return a new instance of {@link IdentityHashMap}
     * @see IdentityHashMap#IdentityHashMap()
     */
    public static <K, V> IdentityHashMap<K, V> newIdentityHashMap() {
        return new IdentityHashMap<>();
    }

    /**

   * an element in the set. For example, {@code contains} returns {@code false} when passed an
   * object that equals a set member, but isn't the same instance. This behavior is similar to the
   * way {@code IdentityHashMap} handles key lookups.
   *
   * @since 8.0
   */
  public static <E extends @Nullable Object> Set<E> newIdentityHashSet() {
    return Collections.newSetFromMap(Maps.<E, Boolean>newIdentityHashMap());
  }

import com.google.j2objc.annotations.J2ObjCIncompatible;
import java.lang.ref.SoftReference;
import java.lang.ref.WeakReference;
import java.time.Duration;
import java.util.ConcurrentModificationException;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jspecify.annotations.Nullable;

/**